From Ginna procedure governing stay time usage: WHEN work area dose rates are greater than 1.5 Rem/hr OR WHEN a single entry into work area is expected to result in while body dose of greater than OR equal to 500 mRem, THEN PERFORM stay time calculations on Attachment 3 (OR equivalent spreadsheet approved by RP Supervision)
1. RMS should be used for Remote Continuous Coverage. 2. PRINT all stay time calculation sheets for review. 3. Stay times may be re-calculated during job, based on workers remaining RWP dose. A new spreadsheet calculation SHALL be performed AND printed for review. 4. USE Attachment 4 (OR equivalent spreadsheet approved by RP supervision) for documenting time keeping. 5. IF RMS is unavailable, THEN ESTABLISH continuous RP coverage AND stay times to ensure compliance with RWP limits. 6. IF RMS fails while being utilized as Remote Continuous Coverage while workers are in work area, THEN INSTRUCT workers to exit area if the connection cannot be restored within the following time (unless otherwise noted on RWP): ∙IF working in dose rates ≤1500 mRem/hr, 5 minutes. ∙IF working in dose rates >1500 mRem/hr, 1 minute. Stephen J Holmes, CHP, PE Sr. Plant Health Physicist, CENG-RE Ginna NPP [email protected] 585-771-3577 From: [email protected] [mailto:[email protected]] On Behalf Of Creamer, Charles E Sent: Tuesday, April 16, 2013 1:34 PM To: [email protected] Subject: Powernet: Stay Time Requirements We are working on INPO AFI responses would like to see what other utilities are using for stay time requirements. Browns Ferry Currently uses the following: ________________________________ Entry into areas which have radiation dose rates such that an individual may receive greater than 1,000 mrem in one hour as measured at 30 centimeters from the source or surface the radiation penetrates, but less than VHRA dose rates, requires an approved RWP which specifies the dose rates in the work area(s) and maximum allowable stay time(s) for individuals in the area. Continuous coverage or remote surveillance (such as a closed circuit TV) by RP field operations personnel responsible for positive exposure control of the activities being performed in the area may be substituted for the RWP stay time requirement except when: 500 mrem/entry exposure is expected Or Work area dose rates (at 30 cm) are greater than 1.5 Rem/hour. ________________________________ Does your site use anything different? All responses are greatly appreciated Chuck Creamer Charles E. Creamer Health Physicist Tennessee Valley Authority Browns Ferry Nuclear Plant P.O. Box 2000 (Mail Stop NAB-1G-BFN) Decatur, Al. 35609-2000 Phone: 256-729-2983 Fax: 256-729-3101 Pager: 1-800-323-4853, pin 30-053 mailto:[email protected] Expect EXCELLENCE! Accept nothing less! This electronic message transmission contains information which may be TVA SENSITIVE, TVA RESTRICTED or TVA CONFIDENTIAL. Any misuse or unauthorized disclosure can result in both civil and criminal penalties. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the content of this information is prohibited. If you have received this communication in error, please notify me immediately by email and delete the original message. This e-mail and any attachments are confidential, may contain legal, professional or other privileged information, and are intended solely for the addressee. If you are not the intended recipient, do not use the information in this e-mail in any way, delete this e-mail and notify the sender. -EXCIP
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